EP2926875B1 - Ski de fond - Google Patents

Ski de fond Download PDF

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Publication number
EP2926875B1
EP2926875B1 EP14162697.8A EP14162697A EP2926875B1 EP 2926875 B1 EP2926875 B1 EP 2926875B1 EP 14162697 A EP14162697 A EP 14162697A EP 2926875 B1 EP2926875 B1 EP 2926875B1
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EP
European Patent Office
Prior art keywords
cross
ski
country ski
country
region
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Active
Application number
EP14162697.8A
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German (de)
English (en)
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EP2926875A1 (fr
Inventor
Thomas Stöggl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paris-Lodron-Universitat Salzburg
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Paris-Lodron-Universitat Salzburg
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Priority to EP14162697.8A priority Critical patent/EP2926875B1/fr
Publication of EP2926875A1 publication Critical patent/EP2926875A1/fr
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • A63C5/126—Structure of the core
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
    • A63C5/0411—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker asymmetric

Definitions

  • the present invention relates to a cross-country ski having along a longitudinal direction an end portion with a ski end, a middle portion with a binding zone for fastening a binding and a starting portion with a ski tip, the cross-country ski having an overall length along the longitudinal direction and the central portion along the longitudinal direction extends over a mid-range length that is 50% of the total length, and wherein the cross-country ski is designed such that in a loaded state of cross-country skiing acting from a tread of cross-country skiing on a flat surface load pressure in the central region is greater than / equal to / as the load pressure in the starting area and / or in the end area.
  • a force distribution element is provided, which is arranged at least in sections over a climbing or repelling zone.
  • the force distribution element causes a pressure distribution under load, which is greater in the climbing or repelling zone than in the initial region and in the end region.
  • WO 9966994 A1 From the WO 9966994 A1 is a cross-country ski is known, which has a convex or parallel shape in the central region instead of a concave waist and concave in the front and rear. This geometric design is intended to favor the well-known skating technique, but is diametrically opposed to the application of the double-push technique.
  • the cross-country ski must allow a curved driving line when folded upwards, so that, as in inline skating an S-shaped course of the driving line can be achieved.
  • a curved driving line can be achieved in principle by a corresponding sidecut of the cross-country ski.
  • the basis for the invention is the recognition that the cross-country ski according to the invention not only must have a sidecut that allows a curved driving line, but also no conventional buckling or loaded state may have no conventional distribution of the load pressure to the digging / braking of cross-country skiing to avoid.
  • the cross-country ski has an entire length along the longitudinal direction and the center portion along the longitudinal direction extends over a central region length, which is 50% of the total length, and wherein the cross-country skiing at least in the central region has a sidecut, according to the invention provided that the cross-country ski is designed such that in a loaded state of cross-country skiing from a tread of Langlaufschis on a flat surface acting load pressure in the middle region is greater than / equal to the load pressure in the starting region and / or in the end region, and that in the central region a minimum weft width is provided which is less than 50 mm, preferably between 40 mm and 42 mm, and in the initial region and / or in the end region, a maximum weft width is provided which is less than or equal to 70 mm, preferably between 50 mm and 59 mm.
  • Such a distribution of the load pressure can be achieved by those skilled in various ways, in particular by a suitable curvature of the cross-country ski or the tread in the unloaded state of cross-country skiing. That is, the running surface of the cross-country ski is arched in the unloaded state such that the load distribution results in the desired distribution of the load pressure.
  • the curvature of the cross-country ski according to the invention may be less than the curvature a conventional cross-country ski.
  • embodiments of the cross-country ski according to the invention would also be conceivable, the curvature zero.
  • a curvature which is opposite to a conventional curvature, conceivable.
  • Another way to achieve the desired distribution of the load pressure is to design the material of the cross-country ski suitably. This can be done, for example, by using different materials in the central region in comparison to the starting region and / or end region, so that the cross-country ski is equally flexible or more flexible in the starting region and / or end region than / in the middle region.
  • Another way of realizing the desired distribution of loading pressure is to use essentially the same material everywhere, but to varying degrees. For the latter, it is particularly appropriate to provide a Schidicke in the middle area greater than / equal to / as the Schidicke in the initial area and / or end.
  • the distribution of the loading pressure according to the invention causes, in particular when the double-push technique is applied, in the folded-up state of the cross-country ski, a substantially homogeneous pressure exerted by that edge on which the cross-country ski is folded onto a level surface.
  • this pressure is called edge pressure.
  • "Aufgekantet" means that the cross-country ski is tilted along the longitudinal direction relative to the flat ground to tilt angle of greater than 0 ° to typically about 40 °, so that the cross-country ski essentially touched only the edge of the flat ground.
  • Such an upturned state is given in the double-push technique during the first and second legprints, wherein the tilt angle is greater the longer the legprint is performed.
  • the edge pressure is a dynamic quantity that varies with time during each leg impression with a substantially parabolic course.
  • each leg impression occurs at a maximum of the edge pressure, which can be up to 1600 N in top athletes, ie about twice the weight of the mass of the athlete amount. This maximum typically lasts from 200 ms to 300 ms.
  • the edge pressure over the respective edge should be substantially homogeneous so that the cross-country ski does not dig into the snow / ground. To what extent really a substantially homogeneous course of the edge pressure is achieved depends in practice u.a. also from the mass of the user, i. the cross country ski should be tailored to the mass of the user.
  • a mean value for the middle range is determined by averaging the load pressure over the entire middle range, and an average value for the start range by averaging the load pressure over the entire start range and an average value for the end range by averaging the load pressure over the entire end range.
  • the resulting mean for the mid-range must be greater than / equal to the mean for the start and / or end of the cross-country ski. It is understood that both when considering the load pressure at individual points and when considering averaged values of the load pressure, the load pressure is always used only for points of the tread which actually contact the flat ground in the loaded state.
  • conventional cross-country ski can have a certain sidecut, since it is quite common, a to have one or a few mm smaller cross-country ski width in the binding zone.
  • specifications of companies are known, which provide a width of 43 mm to 44 mm in a 190 cm long cross-country ski with a width of basically 44 mm in the binding zone.
  • Taillierept are entirely unsuitable for the double-push technique, since they correspond to a far too large radius of curvature of typically more than 600 m.
  • the width of the cross-country ski in the binding zone can be used in accordance with the rules of the FIS (for the season 2013/2014) to clearly distinguish it from an alpine ski.
  • the minimum width under the binding is at least 63 mm, whereas the minimum width under binding for adult cross-country skiing is 40 mm.
  • Alpinschi are therefore not suitable as a cross-country ski, as they are too wide to work as a cross-country ski.
  • the cross-country ski of the invention has a homogeneous distribution of the loading pressure, at least in the central region, wherein the loading pressure is preferably in the initial region towards the ski tip and in the end area towards the ski end slightly decreases.
  • a substantially homogeneous edge pressure can be generated. Therefore, in a preferred embodiment of the cross-country ski according to the invention, it is provided that the cross-country ski is designed such that, in the loaded state, there is a substantially homogeneous distribution of the load pressure in the middle region.
  • substantially homogeneous means that the loading pressure above the midrange around the mean for the midrange only in the range of +/- 5% of the mean varied. For the person skilled in the art, this can be achieved, for example, by a suitable material design or by a very small curvature compared to conventional curvatures, in particular in the middle region, or by no curvature, in particular in the middle region, ie by a curvature, especially in the middle region is zero.
  • the homogeneous distribution of the load pressure can be realized in variants of the cross-country ski according to the invention with a curvature corresponding to a height of 0-15 mm.
  • the heights mentioned are measured in the unloaded state of the respective cross-country skiing between a level surface on which rests the cross-country ski, and the furthest removed from the ground point of the tread in the central region.
  • the tread in the central region has the curvature zero.
  • the cross-country ski is designed such that decreases in the loaded state of the load pressure towards the ski tip and / or to the ski end.
  • Such a behavior can also be achieved by the person skilled in the art in many different ways.
  • An example of this is the appropriate interpretation of the curvature of the cross-country ski, eg by using a so-called rocker design, ie by the cross-country ski in the initial region to the ski tip and / or bent in the end to the ski end. Therefore, it is provided in a preferred embodiment of the cross-country ski according to the invention that in the unloaded state, the tread is curved in the initial region so that decreases in the loaded state of the load pressure to the ski tip. Analogously, it is provided in a preferred embodiment of the cross-country ski according to the invention that in the unloaded state, the tread is curved in the end so that decreases in the loaded state of the load pressure to Schiende out.
  • Another way to achieve the desired distribution of the load pressure is to increase the flexibility of the cross-country ski in the initial region towards the ski tip and / or in the end region towards the ski end.
  • a simple possibility for this results to the skilled person by an appropriate choice or variation of Schidicke.
  • the shoe thickness may decrease continuously toward the ski tip and / or ski end to increase the flexibility of the cross-country ski in these areas, thereby achieving a decrease in the load pressure in these areas.
  • a stepwise decrease of the thickness in the starting region towards the ski tip or in the end region towards the ski end may be provided.
  • the waist corresponds to a radius which is less than or equal to 30 m, preferably less than or equal to 20 m, particularly preferably less is 15 meters.
  • each cross-country ski has a ski inside
  • the Schiinnen charges the two cross-country ski are facing each other.
  • each cross-country ski has a ski outside, with the ski outside facing away from each other.
  • the respective cross-country ski is folded up on the outside of the ski on the first leg print and on the inside of the ski on the second leg print.
  • the resulting S-shaped trajectory may generally have a different curvature for the first legprint than for the second legprint.
  • a different sidecut is provided on a ski outside and on a ski inner side of the cross-country ski.
  • the driving line for the first legprint has a slightly larger curvature (corresponding to a slightly smaller radius) than for the second legprint. Accordingly, in a preferred embodiment of the cross-country ski according to the invention, it is provided that the sidecut on the inner side of the ski corresponds to a radius that is greater than a radius corresponding to the sidecut on the outside of the ski.
  • the sidecut is provided only in the central region.
  • such a geometric design of the cross-country skiing, in which the central region in plan view has a concave shape already allows a satisfactory application of the double-push technique.
  • maximum widths in the starting area and / or end area can thereby be kept low. The latter leads to a lighter cross-country ski with lower inertia and improved maneuverability.
  • Such a geometrical design also makes possible a particularly preferred embodiment of the cross-country ski according to the invention, in which it is provided that the starting area and / or the end area have a substantially convex shape.
  • substantially convex shape means that the initial region / end region has a convex shape except for straight sections.
  • Both the mentioned minimum ski width and the mentioned maximum ski widths help to save mass and reduce the mass moment of inertia of the cross-country ski. This improves maneuverability.
  • the double-push technique without intermediate jump can be applied.
  • This allows for a new skating technique in cross-country and on the other - due to the sidecut - cornering without changing. That is, in addition to the higher running speed, which can be achieved by the double-push technique, the cross-country ski invention also allows increased maneuverability in bends, especially on downhill. Variants in rocker design also offer the possibility of use in fun ski area.
  • Fig. 1 shows a side view of a cross-country ski 1 according to the invention in a loaded state, ie at a static load by a standing on the cross-country ski 1 user (not shown), which has preferably strapped the cross-country ski 1.
  • the cross-country skiing 1 lies on a flat surface 17.
  • the cross-country ski 1 extends along a longitudinal direction 2 from a ski 8 in an end region 7 to a ski tip 4 in an initial region 3. Between the end region 7 and the starting region 3 there is arranged a central region 5 which has a binding zone 6 for receiving a binding (not shown) ) having.
  • the cross-country ski 1 extends along the longitudinal direction 2 over a total length L tot .
  • the central region 5 extends along the longitudinal direction 2 over a middle region length L M , which is 50% of the total length L tot . Accordingly, the sum of the lengths of the starting region 3 and the end region 7 along the longitudinal direction 2 is also 50% of the total length L tot .
  • One possible design is that both the length of the starting region 3 and the end region 7 is 25% of the total length L tot , although deviating configurations are also possible (ie variants are conceivable in which the starting region 3 is longer than the end region) 7 and thus also more than 25% of the total length L tot , or vice versa).
  • the cross-country ski 1 has a running surface 9 with which the cross-country ski 1 can slide on the ground 17.
  • a load pressure P is exerted by the tread 9 on the ground 17.
  • the resulting distribution of the load pressure P is in Fig. 1 represented by arrows.
  • the cross-country ski 1 according to the invention has no pressure points in contrast to conventional cross-country ski. Instead, the distribution of the load pressure P over a wide range, in particular in the central region 5 is substantially homogeneous. In the initial region 3 and in the end region 7, the load pressure P decreases continuously.
  • the loading pressure P is greater in the middle region 5 than in the starting region 3 and in the end region 7.
  • individual points can be compared for this, ie points in the middle region 5 have a higher loading pressure P than points in the starting region 3 and in the end region 7.
  • too averaged values means that a mean value for the middle area 5 is determined by averaging the load pressure P over the entire middle area 5 and an average value for the Start range 3 by averaging the load pressure P over the entire initial range 3 and an average value for the end portion 7 by averaging the load pressure P over the entire end portion 7.
  • the resulting mean value for the middle portion 5 is larger than the average value for the initial portion 3 in the illustrated embodiment It is understood that, both when considering the load pressure P at individual points and when considering averaged values of the load pressure P, the load pressure P is always used only for points of the tread 9, which actually contact the flat ground 17 in the loaded state.
  • the distribution of the load pressure P is achieved on the one hand, that the cross-country ski 1, in contrast to a conventional cross-country skiing over an extremely low curvature, which is also referred to as camber has. That is, the cross-country ski 1 in the unloaded state, ie completely free of any load, has the in Fig. 4 shown form, wherein in Fig. 4 dashed lines the shape of a conventional cross-country ski drawn is.
  • the curvature of the cross-country ski 1 according to the invention corresponds to a height 15 which is significantly smaller than a height 16 corresponding to the curvature of the conventional cross-country ski.
  • the heights 15, 16 are measured with respect to the flat ground 17 on which the cross-country ski 1 or the conventional cross-country ski rests (the heights 15, 16 are measured and are essentially at mutually corresponding points of the cross-country ski 1 and the conventional cross-country ski according to the invention for illustration purposes only Fig. 4 drawn next to each other).
  • Typical values for the height 16 of the conventional cross-country ski are 18 mm to 25, whereas the height 15 of the cross-country ski 1 according to the invention is typically 0 mm to 15 mm.
  • the shape of the cross-country ski 1 causes Fig. 4 in the central region 5 a substantially homogeneous distribution of the loading pressure P.
  • the decrease of the load pressure P in the starting region 3 towards the ski tip 4 is achieved on the one hand by a slight curvature of the running surface 9 towards the ski tip 4.
  • the flexibility of the cross-country ski 1 in the initial region 3 is specifically increased toward the ski tip 4 by a ski thickness 10 preferably decreases continuously towards the ski tip 4.
  • the decrease of the load pressure P in the end region 7 towards the ski end 8 is achieved by a targeted increase in the flexibility of the cross-country ski 1 in the end region 7 towards the ski end 8, in that the ski thickness 10 preferably decreases continuously towards the ski end 8.
  • Fig. 2 shows a plan view of the cross-country ski 1 according to the invention, in which the sidecut is easy to see.
  • the sidecut is easy to see.
  • the sidecut not only in the central region 5, but also in the initial area 3 and end 7 before. That is in all these Due to the waisting areas results in a concave shape of the cross-country ski 1 and the tread 9 (in Fig. 2 not recognizable) in supervision.
  • the waisted area of cross-country ski 1 off Fig. 2 has in the middle region 5, more precisely in the binding zone 6, a minimum width 13, which is between 40 mm and 50 mm, preferably between 40 mm and 42 mm.
  • the waisted region of the cross-country ski 1 ends in each case at a maximum ski width 14 in the starting area 3 or in the end area 7, the maximum ski width 14 in the starting area 3 having a different value than in the end area 7.
  • the maximum ski width 14 is typically less than or equal to 70 mm , preferably between 50 mm and 59 mm.
  • a ski inner side 12 is equal and preferably corresponds to a radius of less than or equal to 30 m, preferably less than or equal to 20 m, more preferably less than or equal to 15 m.
  • the first legprint on the ski outside 11 and the second legprint on the ski inside 12 are made. Since a resulting line of motion (not shown) may have different curvatures for the first legprint and the second legprint, different sidepings, ie Taillierept with correspondingly different radii, be provided for the ski inner side 12 and the ski outside 11.
  • Fig. 3 shows a further embodiment of the cross-country ski 1 according to the invention in a plan view analogous to Fig. 2 ,
  • the sidecut is limited to the middle region 5.
  • the maximum weft width 14 can be found, whereby this can have different values, as above for the Embodiment of Fig. 2 described, typically less than or equal to 70 mm, preferably between 50 mm and 59 mm.
  • the minimum width 13 in the binding zone 6 is also like in the embodiment of Fig. 2 between 40 mm and 50 mm, preferably between 40 mm and 42 mm.
  • both the starting region 3 and the end region 7 have a substantially convex shape, ie, the starting region 3 / end region 7 has a convex shape except for rectilinear sections.
  • This geometric design has the additional advantage that the maximum ski width 14 is lower, thus achieving weight savings and a reduction in the mass moment of inertia. Furthermore, this geometry causes that in the bent state of the cross-country ski 1 too strong trenching (braking) of the starting portion 3 and end portion 7, which is basically favored by the sidecut, is prevented.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Claims (13)

  1. Ski de fond (1) présentant dans un sens longitudinal (2) une partie de fin (7) avec une extrémité de ski (8), une partie intermédiaire (5) avec une zone de fixation (6) pour l'attachement d'une fixation et une partie de début (3) avec une pointe de ski (4), le ski de fond (1) présentant dans le sens longitudinal (2) une longueur totale (Lges) et la partie intermédiaire (5) s'étendant dans le sens longitudinal (2) sur une longueur de partie intermédiaire (LM) représentant 50 % de la longueur totale (Lges), et le ski de fond (1) étant conçu de telle façon que dans un état en charge du ski de fond (1), une pression de mise en charge (P) agissant par une surface de glissement (9) du ski de fond (1) sur un terrain plan (17) soit supérieure ou égale dans la partie intermédiaire (5) à la pression de mise en charge (P) dans la partie de début (3) et/ou dans la partie de fin (7), caractérisé en ce que le ski de fond (1) présente au moins dans la partie intermédiaire (5) une zone de largeur réduite, en ce qu'une largeur minimale du ski (13) inférieure ou égale à 50 mm, de préférence comprise entre 40 mm et 42 mm, est prévue dans la partie intermédiaire (5) et en ce qu'une largeur maximale du ski (14) inférieure ou égale à 70 mm, de préférence comprise entre 50 mm et 59 mm, est prévue dans la partie de début (3) et/ou dans la partie de fin (7).
  2. Ski de fond (1) selon la revendication 1, caractérisé en ce que le ski de fond (1) est conçu de telle manière que dans l'état en charge, la pression de mise en charge (P) varie sur la partie intermédiaire (5) autour d'une moyenne pour la partie intermédiaire (5) dans une plage de ± 5 % de la moyenne.
  3. Ski de fond (1) selon l'une des revendications 1 à 2, caractérisé en ce que dans un état sans charge, la surface de glissement (9) présente une courbe nulle dans la partie intermédiaire (5).
  4. Ski de fond (1) selon l'une des revendications 1 à 3, caractérisé en ce que le ski de fond (1) est conçu de telle manière que dans l'état en charge, la pression de mise en charge (P) diminue vers la pointe du ski (4) et/ou vers l'extrémité du ski (8).
  5. Ski de fond (1) selon la revendication 4, caractérisé en ce que dans l'état sans charge, la surface de glissement (9) est infléchie dans la partie de début (3) de telle façon que dans l'état en charge, la pression de mise en charge (P) diminue vers la pointe du ski (4).
  6. Ski de fond (1) selon l'une des revendications 4 à 5, caractérisé en ce que dans l'état sans charge, la surface de glissement (9) est infléchie dans la partie de fin (7) de telle manière que dans l'état en charge, la pression de mise en charge (P) diminue vers l'extrémité du ski (8).
  7. Ski de fond (1) selon l'une des revendications 4 à 6, caractérisé en ce qu'une épaisseur du ski (10) varie dans la partie de début (3) de telle façon que dans l'état en charge, la pression de mise en charge (P) diminue vers la pointe du ski (4).
  8. Ski de fond (1) selon l'une des revendications 4 à 7, caractérisé en ce qu'une épaisseur du ski (10) varie dans la partie de fin (7) de telle façon que dans l'état en charge, la pression de mise en charge (P) diminue vers l'extrémité du ski (8).
  9. Ski de fond (1) selon l'une des revendications 1 à 8, caractérisé en ce que la zone de largeur réduite correspond à un rayon inférieur ou égal à 30 m, de préférence inférieur ou égal à 20 m, en particulier inférieur ou égal à 15 m.
  10. Ski de fond (1) selon l'une des revendications 1 à 9, caractérisé en ce qu'une zone de largeur réduite différente est prévue sur un côté extérieur du ski (11) et sur un côté intérieur du ski (12) du ski de fond (1).
  11. Ski de fond (1) selon la revendication 10, caractérisé en ce que la zone de largeur réduite sur le côté intérieur du ski (12) correspond à un rayon supérieur au rayon auquel correspond la zone de largeur réduite sur le côté extérieur du ski (11).
  12. Ski de fond (1) selon l'une des revendications 1 à 11, caractérisé en ce que la zone de largeur réduite est prévue seulement dans la partie intermédiaire (5).
  13. Ski de fond (1) selon la revendication 12, caractérisé en ce que la partie de début (3) et/ou la partie de fin (7) présentent une forme convexe à l'exception des parties rectilignes.
EP14162697.8A 2014-03-31 2014-03-31 Ski de fond Active EP2926875B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14162697.8A EP2926875B1 (fr) 2014-03-31 2014-03-31 Ski de fond

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Application Number Priority Date Filing Date Title
EP14162697.8A EP2926875B1 (fr) 2014-03-31 2014-03-31 Ski de fond

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EP2926875A1 EP2926875A1 (fr) 2015-10-07
EP2926875B1 true EP2926875B1 (fr) 2017-05-31

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066994A1 (fr) * 1998-06-25 1999-12-29 Fischer Gesellschaft Mbh Ski de fond

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT369273B (de) * 1979-11-29 1982-12-27 Fischer Gmbh Schi, insbesondere alpinschi
FR2657533B1 (fr) * 1990-01-29 1992-04-03 Salomon Sa Ski de fond pour patinage.
US6382658B1 (en) * 1997-11-19 2002-05-07 North Shore Partners Method of making a snowboard having improved turning performance
DE102010031838A1 (de) * 2010-07-22 2012-01-26 Blizzard Sport Ges.M.B.H. Gleitbrett, insbesondere Ski
AT510559B1 (de) * 2010-11-16 2012-05-15 Atomic Austria Gmbh Langlaufschi mit wenigstens einem mittel zur rückgleithemmung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066994A1 (fr) * 1998-06-25 1999-12-29 Fischer Gesellschaft Mbh Ski de fond

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